/Engine/Plugins/Animation/ControlRig/Source/ControlRig/Public/Rigs/RigHierarchy.h
Sets the weight of a parent below a multi parent element
Returns true if changing the weight was successful
[UFUNCTION](Programming/UnrealArchitecture/Reference/Functions)(BlueprintCallable, Category=URigHierarchy) bool SetParentWeight ( [FRigElementKey](API\Plugins\ControlRig\Rigs\FRigElementKey) InChild, [FRigElementKey](API\Plugins\ControlRig\Rigs\FRigElementKey) InParent, [FRigElementWeight](API\Plugins\ControlRig\Rigs\FRigElementWeight) InWeight, bool bInitial, bool bAffectChildren )